Process of lithographing



V BoEDErELn and MARCUS Patented Jan. 6, 1925. v

UNITED s'raras ANTONIO JOSEPH BOEDEFELD AND'MARGUS PAGE EX L INE, OF DALLAS, TEXAS.

PROCESS OF LITHOGRAPI-IING.

No Drawing To all whom it may concern:

Be it known that we, ANTONIO JOSEPH PAGE EXLINE, citizens of the United States, residing at Dallas, in thecounty of Dallas and State of Texas, have invented certain new and useful Improvements in Processes of Lithographing; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a lithographic process more particularly designed for use in making bank checks at one printing operation, the complete check having a socalled safety'background which is normally provided to insure a degree of safety against erasures or alterations.

The present invention is designed with a view of permitting the lithographing of a complete check with safety background at one printing operation, thus enabling the production of bank checks at greatly reduced cost. Plain paper or tinted paper susceptible to chemical discoloration may be used depending on whether or not chemically sensitive checks are desired.

A special individual design such as might be desired by the bank is first made upon a lithographic stone; This design for convenience of description may be termed the primary design and will ordinarily be comparatively small and preferably located at about the middle of the check extending across the lines on which are written the payee and the spelled-out amount of the check. An impression on transfer paper is taken of this design and transferred to a blank zinc plate in the usual manner, as by being pulled through a press. The transfer paper is sponged off inthe usual manner and the plate dried. After drying, the plate is covered with acidulated gum arabic which is allowed to dry and then washed off with water. The ink from the impression is also washed off with turpentine and the plate rinsed with water and dried.

A secondary design is superposed over th primary design, the secondary design being on an independent stone and transferred to the zinc plate already treated as above,.the same being free of ink and clean, by transfer paper in the usual manner, as by being pulled through a press. The transfer paper is sponged off with water and the plate dried.

Application filed April 19, 1924. Serial No. 757,778.

Acidulated gum arabic is spread over the dry plate and allowed to dry-after which it is washed off with water and theink removed with turpentine. The plate is then inked up by rubbing upand use of regular transfer roller, and gummed up in the regular manner. For convenience of description the comblned "prlmary' and secondary designs may be termed the main design.

' background plate is prepared from a design of either ruling or lettering as de- 7 sired. The background from a stone to a new plate in the usual manner by means of transfer paper. -'lhe plate is'treated in the same manner as already described. lVhen the background is sufficientlylight, an impression on transfer paper is taken.

An impression on transfer paper of the main design on the previously prepared is transferred plate is taken and'the border of the same carefully cut out. on the background design (on transfer paper) and secured thereto in'the usual manner as by means of a stickup needle;

This is placed face up" A third zinc plate is prepared and on this plate is placed the combined background I and main design in the usual manner as by being pulled through a press. The transfer paper is sponged 01f the plate washed with water, gummed up and dried, and" again washed with water. The'inkis washed ofi with turpentine and the plate inked up by rubbing and use of the regular transfer roller. V

An impression on transfer paper of the regular check matter is then placed face down on the plate last mentioned and pulled through the press in the usual manner. The paper is-washed off; the plate dried, gummed up, again dried, washed with water, the ink washed out with turpentine, and inked up by rubbing and use V standard form as a check.

are immediately noticeable. Plates of the abov'e char'acter can be made by regular lithographers and supplied to the trade for use'iinthe regular Way. Regular lithog raphers are thus enabled to lithograph checks like any other lithograph job.

What we claim is:

1. The method of making an original lithographic plate having different degrees of color tones which consists in placing a main design on one plate, a background design on asecond plate, taking an impression on transfer paper of each design and superpo'sing the main design on the background design, transferring the combined design to a third plate, and placing on the last-named plate impression of 2. The steps in method of making an originalf lithographic plate Which consists in placing on a'plate a main design by means of transfer paper, etching the plate, removing the ink impression therefrom, superpo'sing a secondary design over the first design by means of transfer paper,

plate, superposing a second design on the first by means of transfer paper, etching the second design, removing the ink from the plate, taking an impression on transfer paper of the combined design, placing the impression on a larger impression. on transfer paper of a background, placing the background and superposed design on a second plate, etching the plate in the usual manner, removing the ink thereon and reinking the plate, and placing a standard form or printed matter on the last named plate by means of transfer paper.

In testimony whereof We affix our signatures.

ANTONIO JOSEPH BOEDEFELD.

MARCUS PAGE EXLINE. 

